FB_BA_TrendLogging

The template logs the values from a data source and records them in the Trendlog memory. The connection to the Trendlog objects (data sources, e.g. FB_BA_BO_IO, FB_BA_AO_IO) is made via references.

The variable TrendCount defines the size of the field of trendlog objects.

	The initialization of the template takes place within the method FB_Init.

Syntax

FUNCTION_BLOCK FB_BA_TrendLogging EXTENDS FB_BA_View
VAR_INPUT CONSTANT
  Trends         : ARRAY[1..TREND_COUNT] OF FB_BA_Trend;
END_VAR
VAR
  i              : UDINT;
END_VAR
VAR CONSTANT
  TREND_COUNT    : UDINT := 30;
END_VAR

Inputs CONSTANT

Name	Type	Description
Trends	FB_BA_Trend	Field with 30 entries for trend log objects.

Variables

Name	Type	Description
i	UDINT	Counter for the FOR loop to call the trendlog field Trends.

Variables

Name	Type	Description
TrendCount	UDINT	Constant to define the set of trendlog objects to be logged. Preset to 30.

Requirements

Development environment	Necessary function
TwinCAT from v3.1.4024.35	TF8040 \| TwinCAT Building Automation from V5.0.0.0